Proxies

= piece of software or hardware that acts as an intermediary for requests from clients seeking resources from other servers.

• used to filter requests, log requests, or sometimes transform requests. Its cache can serve a lot of requests (If multiple clients access a particular resource, the proxy server can cache it and serve it to all the clients without going to the remote server.)

Types:

• Open Proxy — accessible by any Internet user. Allows users within a network group to store and forward Internet services such as DNS or web pages to reduce and control the bandwidth used by the group.

• Anonymous Proxy — reveals іts іdentіty аs а server but does not disclose the іnіtіаl IP address

• Trаnspаrent Proxy — іdentіfіes іtself, аnd wіth the support of HTTP heаders, the fіrst IP аddress cаn be vіewed.

• Reverse Proxy — retrieves resources on behalf of a client from one or more servers